Garuda

You may be looking for Garuda: FFXIV or the  Garuda Interceptor: FFXIII

Garuda is a flying Wind fiend in Mobius Final Fantasy. It is found as a special event-only foe during the Final Fantasy X Collaboration Event Dream Within a Dream, where it is considered a giant version of the Shantak.

All of the Garuda's attacks are the same as a Shantak, but it has at least twice the HP and Break of its smaller sibling. The Garuda also casts a pre-emptive Sonic Boom at the start of battle, leaving behind status effects that can slow down your retaliation.

Encounters
The Shantak can be found in these event Regions:
 * Dream Within a Dream, Part 3
 * Dream Within a Dream, Part 4
 * Dream Within a Dream - Conclusion
 * Dream Within a Dream epilogue: A Lonely Dream

Reference
The Garuda is modelled from the foe of the same name in Final Fantasy X.